Nothing, so far, and I put 23,000 miles on it in 9 months.
Great car. This is my fourth Subaru. Drove all the other three over 100,000 miles. Only downside on this particular car is the driver's seat. Not very comfortable.
I totally agree on the seats. I don't think the seats are that comfortable in the Outback. Other than that, we have been very happy with ours.
I agree with the seats being uncomfortable. I can only drive a short while before my back starts bothering me.